Mr. Kramer, a 19-year-old FedEx employee, allegedly injured six people and left one of them in critical condition in the incident that began at 5:54 a.m., according to police. The victims, whose ages ranged from 19 to 52, were taken to a nearby hospital for treatment, according to a spokeswoman for the WellStar Kennestone Hospital in Marietta, Ga. Police found the alleged gunman dead from...